[gcc r14-7321] gccrs: ast: Add NodeId and clone to RestPattern

[Arthur Cohen]

https://gcc.gnu.org/g:cc89c429d6fe50544b1282b7ca58a10e524490f4

commit r14-7321-gcc89c429d6fe50544b1282b7ca58a10e524490f4
Author: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
Date:   Wed Mar 1 10:54:29 2023 +0100

    gccrs: ast: Add NodeId and clone to RestPattern
    
    The RestPattern AST node did not have any NodeId to identify it and
    could therefore not be instanciated.
    
    gcc/rust/ChangeLog:
    
            * ast/rust-pattern.h (class RestPattern): Add NodeId as well as
            the clone_impl function.
    
    Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

Diff:
---
 gcc/rust/ast/rust-pattern.h | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/gcc/rust/ast/rust-pattern.h b/gcc/rust/ast/rust-pattern.h
index 8200b805f6b..fbff0e4e50a 100644
--- a/gcc/rust/ast/rust-pattern.h
+++ b/gcc/rust/ast/rust-pattern.h
@@ -194,15 +194,26 @@ protected:
 class RestPattern : public Pattern
 {
   Location locus;
+  NodeId node_id;
 
 public:
   std::string as_string () const override { return ".."; }
 
-  RestPattern (Location locus) : locus (locus) {}
+  RestPattern (Location locus)
+    : locus (locus), node_id (Analysis::Mappings::get ()->get_next_node_id ())
+  {}
 
   Location get_locus () const override final { return locus; }
 
   void accept_vis (ASTVisitor &vis) override;
+
+  NodeId get_pattern_node_id () const override final { return node_id; }
+
+protected:
+  RestPattern *clone_pattern_impl () const override
+  {
+    return new RestPattern (*this);
+  }
 };
 
 // Base range pattern bound (lower or upper limit) - abstract